I've found an interesting error on some maps, such as
this map here. If you aren't getting the same problem as me, it
looks like this. The spawn point marker appears several times in the render, I can drag the render left or right as far as I want and it never ends, and zooming in will never produce a part of the map that has rendered, I just get black unrendered area all the way up to and including the maximum zoom limit.
To add to this, when I refreshed the page I was
greeted with this.